Rails 3 deprecated methods and APIs

Question

Where can one find a list of deprecated methods, APIs, etc, in order to upgrade from Rails 2.x to Rails 3?

Answer 1

How to disable colorize logging in ActiveRecord without Rails? Instead of keeping AR decoupled, independent ORM, it is now tightly bound to Rails framework.

Moving ActiveRecord::Base.colorize_logging to Rails::LogSubscriber.colorize_logging was just bad design and the wrong direction, wasn't was?